Unity3D should hop on board the Raytracing race. It may not be important right now, but it seems that the competitor Unreal Engine is investing hugely in the new technology and it would be a great chance for Unity3D to catch up or even outperform in the Lighting fidelity.
Here are some important articles, especially if you somehow have not heard about Raytracing yet:
It would be so nice to get started in developing apps and drivers. So that we are ready by the time the next GPU generation hits when it is probably working way better.